Burglar-alarm device.



L. H. BERG.

BURGLAR ALARM DEVICE.

APPLIGATION FILED AUG. 16, 1913.

1,112,592. Patented 0013.6, 1914.

51m/vento@ EW/5 /7. 9596,

UNITED STATES PATENT OFFICE.

LEWIS H. BERG, OF NEW YORK, N. Y., ASSIGNOR 0F ONE-HALF TO LOUIS JERKOWSKI, OF NEW YORK, N. Y.

BURGLAR-ALARM DEVICE.

To all whom 'it may concern Be it known that I, Lewis H. BERG, a citizen of the United States, and residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Burglar- Alarm Devices, of which the following is a specification, such as will enable those skilled in the art to which it appertains to make and use the same.

The object of this invention is to provide an improved burglar alarm device which may be conveniently used in connection with doors, or window sashes, and whichon the opening of a door or window sash will operate automatically, and with this and other objects in view the invention consists in a device of the class specified, constructed as hereinafter described and claimed.

In the accompanying drawing, I have shown my improvement applied to a door, and the invention is fully disclosed in the following specification, of which the accompanying drawing forms a part, in which the separate parts of my improvement are designated by suitable reference characters in each of the views, and in which Figure l is a sectional view of a part of a door frame and a part of a door and showing the method of using my improvement in connection therewith; Fig. 2 a side view of an electric circuit making and breaking device which I employ; Fig. 3 a front view thereof; and, Fig. 4 a sectional view of a part of said circuit making and breaking device and on an enlarged scale.

In the drawing forming part of this invention, I have shown at a a part of a door frame and at 7) a part of adoor hinged to said frame and adapted to open in the direction of the arrow fc, and in the practice of my invention, I provide a plate or board c on which is mounted a battery CZ of any preferred form and an ordinary electric buzzer e, and the battery (Z and the buzzer e are connected by a circuit wire f and other circuit wires g and 71, are connected respectively with the battery Z and buzzer e in the usual manner, and as will be understood by all those familiar with this class of devices.

The circuit wires g and 7a are preferably twisted together to form a single rope or cable t' of any desired length, and the end portions g2 and 7b2 of the circuit wires g and Specification of Iletters Patent.

App1ication led August 16, 1913.

Patented Oct. 6, 1914.

serial No. 785,082.

7i, are connected with my imprI ved circuit making and breaking device 7c constructed as shown in Figs. 2, 3 and 4:.

The circuit making and breaking device 7a involves two fiat jaw members 7a2 and 7a3 mounted on a pintle 7s4 in the manner of the plates of a hinge, and the jaw members 7a2 and 7c3 are provided respectively with projecting shank and handle members 7t5 and 72' which project from said pintle in diverging lines or planes and preferably in an angle to said jaw members, and one of said shank and handle members is preferably provided with a hole or aperture 7e7 by means of which the circuit making and breaking device may be suspended from a hook, nail or other support, if desired. The aw members 762 and 7e3 are also provided with binding-posts m and n consisting of screws which are passed outwardly therethrough and provided at their outer ends with nuts m2 and n2 respectively, and the binding post m is insulated from the corresponding jaw, as shown at o, and the ends g2 and 7b3 of the circuit wires g and 7L are connected with said binding posts as shown.

A spring p is wound on the pintle 704 and provided with projecting spring lingers p2 which bear on the outer sides of the jaws 7a2 and 7c and normally hold them, when the circuit making and breaking device is not in use, in contact, as shown in Figs. 2 and 4, and in order to break the circuit all that is necessary is to press the shank and handle members 7c5 and 7cG together, or into the same plane, which operation will separate the jaws c2 and 7c3 as shown in Fig. l, in which ligure the circuit making and breaking device is shown in use.

In the use of this device the plate or board c with the battery c7 and buzzer o may be connected with a door frame adjacent to the door in any desired manner, or may be placed at any point and supported in any way, and the shank and handle members 7x5 and 7s of the circuit making and breaking device aie passed between the door and the door frame, the door being open or partially open for this purpose, after which the door is closed and secured in the usual. manner. This operation of closing and securing a door separates the aws 702 and 703 and breaks the circuit as shown in Fig. l, said circuit being normally closed, and if an attempt be LUX made to open the door` and said door be partially ope-'n the circuit making and breaking device will drop out and the jaws 702 and 7c3 will be forced together by the spring fingers p2, the circuit will be completed and the buzzei,1 or alarm device will be operated.

The buzzer e is provided, in practice, with a hand-operated switch r by which the circuit may be completed o-r broken, whenever desired, and whenv desired the circuit wires g and h maybe folded backwardly on the plate or board c and the circuit making and breaking device it laid thereon, and the entire device or apparatus may be placed in a small boX and conveniently carried in a handbag or other receptacle.

Although l have shown and described the battery and buzzer as connected with the plate or board c it will be aoparent that this is not necessary as the entire device or apparatus may be placed in a small box, of which the plate or board c forms the bottom, and other changes in and modilications of the construction herein described may be made, within the scope of the appended claim, without departing' from the spirit of my invention or sacriiicing its advantages.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is

ln an apparatus of the class described, an

. electric circuit making and breaking device comprising spring-operated jaws hinged together and normally held in Contact and provided with diverging thin flat Shanks, and electric circuit wires connected with said aws, and the spring` by which the aws are operated being wound on the pintle pin of the hinge by which said jaws are connected and being provided with projecting portions which bear on the backs of said jaws.

ln testimony that l claim the foregoing as my invention i have signed my name in presence of the subscribing witnesses this 9th day of August 1913. LEY/HS H. BERG.

lVitncsses C. MULREANY, H. G. THOMPSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

- Washington, D. G. 

